io.micronaut.scheduling.instrument.ThreadFactoryInstrumenter Maven / Gradle / Ivy
/*
* Copyright 2017-2020 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.scheduling.instrument;
import io.micronaut.context.event.BeanCreatedEvent;
import io.micronaut.context.event.BeanCreatedEventListener;
import io.micronaut.core.annotation.Internal;
import javax.inject.Singleton;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ThreadFactory;
/**
* Wraps {@link ThreadFactory} to instrument {@link Runnable}.
*
* @author Denis Stepanov
* @since 1.3
*/
@Singleton
@Internal
final class ThreadFactoryInstrumenter implements BeanCreatedEventListener {
private final List invocationInstrumenterFactories;
/**
* Creates new instance.
*
* @param invocationInstrumenterFactories invocation instrumentation factories
*/
public ThreadFactoryInstrumenter(List invocationInstrumenterFactories) {
this.invocationInstrumenterFactories = invocationInstrumenterFactories;
}
/**
* Wraps {@link ThreadFactory}.
*
* @param event The bean created event
* @return wrapped instance
*/
@Override
public ThreadFactory onCreated(BeanCreatedEvent event) {
if (invocationInstrumenterFactories.isEmpty()) {
return event.getBean();
}
ThreadFactory original = event.getBean();
return r -> original.newThread(instrument(r));
}
private Runnable instrument(Runnable runnable) {
return InvocationInstrumenter.instrument(runnable, getInvocationInstrumenterList());
}
private List getInvocationInstrumenterList() {
List instrumenters = new ArrayList<>(invocationInstrumenterFactories.size());
for (InvocationInstrumenterFactory instrumenterFactory : invocationInstrumenterFactories) {
final InvocationInstrumenter instrumenter = instrumenterFactory.newInvocationInstrumenter();
if (instrumenter != null) {
instrumenters.add(instrumenter);
}
}
return instrumenters;
}
}